Components for slings - Safety - EN 1677 for components for slings are:
Part 1: Forged steel components, Grade 8
Part 2: Forged steel lifting hooks with latch - Grade 8
Part 3: Forged steel self-locking hooks - Grade 8
Part 4: Links - Grade 8
This European Standard specifies requirements for forged steel self-locking lifting hooks of Grade 8 having eye or clevis and pin up to 21,2 t working load limit (WLL), mainly for use in:
chain slings according to EN 818-4;
steel wire rope slings according to prEN 13414-1:1999;
textile slings according to EN 1492-1:2000, EN 1492-2:2000
intended for lifting objects, materials or goods
Working Load Limit (WLL): Maximum mass that a component is authorized to sustain in general lifting service, expressed as a code.
Manufacturing Proof Force (MPF): Force applied to the component during the manufacturing proof test.
Breaking Force (BF): Maximum force reached during the static tensile test of the component, at which the component fails to retain the load.
Self-locking Hook: hook containing a locking mechanism, capable of being activated by the action of the load which, once correctly closed and locked, can only be opened in the unloaded condition by de-activation of the locking mechanism.
